Y Combinator Startups in Seattle that are currently hiring 2024

June 2024

Browse 12 of the top startups funded by Y Combinator. Headquartered in Seattle, these are some of the hottest and fastest-growing startups. Their teams are well-funded and actively hiring.

We also have a Startup Directory where you can search through over 5,000 companies.

  • Mixpanel
    Mixpanel (s2009)Active • 410 employees • San Francisco, CA, USA
    Mixpanel is analytics for builders that need answers from their data at their fingertips. When everyone in the organization can see — and learn from — the impact of their work, they are poised to make better decisions. Companies like OpenAI, Netflix, Pinterest, sweetgreen, CNN, samsara, Uber, and Yelp use Mixpanel to understand their customers, measure progress, and endeavor to make better decisions.
  • Relativity Space
    Relativity Space (w2016)Active • 1,000 employees • Los Angeles, CA, USA
    Relativity is building humanity’s multiplanetary future. We invented a new approach to design, build, and fly our own rockets, starting with Terran 1 – the world’s first entirely 3D printed rocket, and Terran R, our next generation medium-heavy lift fully reusable launch vehicle. As a vertically integrated technology platform, Relativity is at the forefront of an inevitable shift toward software-defined manufacturing. By fusing 3D printing, artificial intelligence, and autonomous robotics, we are pioneering the factory of the future. Disrupting 60 years of aerospace, Relativity offers a radically simplified supply chain, building a rocket with 100x fewer parts in less than 60 days. We believe in a future where interplanetary life fundamentally expands the possibilities for human experience. Our long-term vision is to upgrade humanity’s industrial base on Earth and on Mars.
  • Worklytics
    Worklytics (w2018)Active • Seattle, WA, USA
    Worklytics identifies leading drivers of employee engagement, without the need for repetitive surveys. It does this by passively analyzing anonymous collaboration data, in tools like Google Workspace and Slack, and detecting patterns that lead to greater employee satisfaction. Worklytics uses these insights to promote positive organizational change by proactively nudging leaders and managers.
  • Gordian Software
    Gordian Software (w2019)Active • 20 employees • Bellevue, WA, USA
    Our APIs enable the world's leading travel organizations to delight travelers and increase revenue. Our customers are companies like Priceline, Hopper and Trip.com, and we support over 140 airlines including partnerships with Lufthansa Group, United Airlines, and Singapore Airlines. Gordian has grown rapidly and serves more than 60 million passengers per month. Launched in 2017, Gordian is backed by Y Combinator, Accomplice, Vinyl, Kinnevik, DST Global Partners, Latitude, and Naval Ravikant. For more information, visit gordiansoftware.com
  • Milo
    Milo (w2020)Active • 4 employees • San Francisco, CA, USA
    Milo is the Family AI. We give busy parents back time + mindshare by tackling the daily details with a behind the scenes co-pilot. By pairing a human in the loop with the latest in LLM capabilities we're able to effectively build a copilot for detailed, high context and noisy tasks, via a simple conversational SMS interface.
  • treble.ai
    treble.ai (s2019)Active • 38 employees • São Paulo, State of São Paulo, Brazil
    We help companies build and scale marketing campaigns through WhatsApp, reaching their customers anywhere in the world with engaging conversations. With our platform, businesses can create and send conversations massively to users and get analytics to improve their campaign performance over time, increasing conversion in every stage of the funnel.
  • adyn
    adyn (s2020)Active • 7 employees • Seattle, WA, USA
  • Whalesync
    Whalesync (s2021)Active • 4 employees • Miami, FL, USA
    Whalesync makes data syncing easy. Our automation platform syncs data between key business tools like HubSpot and Airtable. We give developers and ops teams two-way, real-time sync, so they can build production-ready workflows. Whalesync launched during Y Combinator’s S21 cohort. Since then we’ve raised from some of the world’s top investors. We’re now trusted by hundreds of companies like [Ramp](https://ramp.com/), [Webflow](https://webflow.com/), and [Alchemy](https://www.alchemy.com/), and process millions of transactions every day. Many of our customers enjoy the product so much they [tell all their friends](https://whalesync.com/preach).
  • Strac
    Strac (w2022)Active • 6 employees • Bellevue, WA, USA
    Strac DLP (Data Loss Prevention) is an AI Company that eliminates data leaks from SaaS, Cloud, Endpoints and Generative AI apps by automatically detecting and remediating the most sensitive customer data like SSN, DL, Passport, Bank Statements, etc. across all communication channels like Office 365, Gmail, Slack, Onedrive, Google Drive, Zendesk, Salesforce, ChatGPT, Chrome, Jira, Web Applications, Mac, Endpoints, etc.
  • Emobi
    Emobi (w2022)Active • 9 employees • San Francisco, CA, USA
    At Emobi, our mission is to revolutionize the e-mobility industry with cutting-edge AI/ML technologies. The Emobi hub offers instantaneous access to a vast network of EV charging networks and e-mobility partners, while ensuring superior data quality through our refinement models. Our ecosystem guarantees a seamless and high-quality charging experience. At Emobi's V2X and JustPlug Lab, we also utilize Plug & Charge (ISO 15118) and Vehicle-to-Grid (V2G) technologies to facilitate secure communication among electric vehicles, chargers, grid systems, and city infrastructures. Emobi has garnered trust from leading EV manufacturers, e-mobility enterprises, startups, and esteemed U.S. Government Agencies like the Department of Energy (DoE) and the Department of Transportation (DoT). Join us as we drive innovation in the dynamic world of e-mobility.
  • Theneo
    Theneo (w2022)Active • 15 employees • San Francisco, CA, USA
    Next-Gen API Documentation with AI Brilliance. Generate Stripe-like API docs in just a few seconds.
  • Aurelian
    Aurelian (s2022)Active • 2 employees • Seattle, WA, USA
    Aurelian automates non-emergency calls to police departments. Our AI-powered operator instantly routes, triages, and resolves calls so citizens get exactly what they need and 9-1-1 dispatchers get to focus on emergencies. Upwards of 80% of total call volume faced by public safety agencies are administrative calls e.g., citizens trying to pay parking tickets or reporting a power outage. Aurelian lessens this burden and lets 9-1-1 dispatchers deal with actual emergencies.